Device for testing fabric.



E. E. A. G. MEYER.

DEVICE FOR TESTING FABRIC.

APPLlcATloN FILED FEB.24.1916.

Patented Nov. 5,1918.

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8 E w W HI8 A TTOR/VE V E. E. A. G. MEYER.

DEVICE FOR TESTI NG FABRIC.

APPLlcATsoN FILED FE.24,1s1s,

LME@ zzmnmd Nov. 5, 1918.

2 SHEETS-SHEET 2.

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j like :EMWIN E. Il.. Gr. MEYER, UF DIETROJET, MlCl-HGAN, ASSIGNUJH', TU MORGAN da WRIGHT, .tl CORPORATIUN UJF IwllCHllGrdlil'.

Patented ltlotn. 5; fdl@ Aftpplication led february all, 191e. Serial No. lLll.

To all whom t may concern:

Be it known that ll, ERwrN lll. A.. G. Marien, a citizen of the United States, residing at Detroit, county of Wayne, and State of Michigan, have invented certain new and useful improvements in Devices for Testing lFabric, of which the following is a full, clear, and exact description.

'lhis invention relates to devices for testing fabric and has for an object to provide a device for determining the breaking point of fabric under conditions approximating conditions existing in the fabric when in use in theproduct.' rllhe device will be described in connection with the testing of fabric for use in the manufacture of tires.

lin the carcass or fabric portion ofa tire the warp and weft threads are subjected simultaneously to chahng at their intersections. 'lo reproduce as nearly as possible this chafing action while testing fabric the present invention provides means for placing both the warp and weft threads of the fabric under tension simultaneously. 'llhe invention provides means-for automaticall indicating the amountl of tension at which the threads break under the above conditions. I'lhns the breaking points of various grades of fabric may be determined while subjected to approximately the same conditions that exist in a tire in service. A comparison of the results will indicate which grade of fabric is best suited for use in the manufacture of a tire 'lhe invention can be readily understood from the following description taken in conn nection with the accompanying drawing, in which:

Figure lis a plan view of the device;

Fig. 2 is a side elevation of the device;

Vlig. 3 is a detail sectional view of one of the feed nuts;

Figa is an underneath plan view of the indicating device; j

lllig. 5 is a detail view partly in section, showing one of the adjusting members.

Referring now to the drawings in which characters of reference designate similar parts,- 10 designates a standard which is" mounted upon a suitable base l1 and is equipped with radially disposed arms l2 extending at right angles to each other. Each arm is provided with a pair of longitudinally extendlng guides 13. Each pair of guides carries a sliding block ld having guide lugs v under the warp threads `same chaing action will occur at l5 on the sides that t in grooves 16 in the guides. Each block is equipped with a fixed jaw 17 and a movable jaw 18, the latter preferably being set and released by means of a screw 19. '.lhe jaws have intertting faces 20 which obtain a firm grip upon certain of the threads of the fabric to be tested. rlFhe jaws of opposite arms l2 are closed upon the same threads in the fabric to be tested, and are then moved simultaneously outward by movement of the blocks 1t longitudinally of the guides 13 through the instrumentality of feed screws 21 and traveling nuts 22 which will presently be described in detail.

vPreferably the jaws grasping one set of the threads9 for example, the weft first moved outwardly to place the threads a predetermined tension which is somewhat less than that required to break the threads. '.lhe jaws are automatically locked in this position by pawls 23 which are Vcarried by the blocks 1l and engage in racks 2l on the guides. 'llhen the jaws grasping the'other set of the threads, that is, the warp threads, are moved outwardly until are stretched to and past the breaking point which is automatically registered as will be presently described. Since the warp threads are stretched over tensioned weft threads approximately the the intersections of both sets of threads as occurs in the fabric of a tire in service. Consequently, the breaks will occur at said intersections as they do in a tire and the amount of tension necessary to cause these breaks will be ap'- proximately the4 same as that required to produce the same result in a tire.

'llhe feed screws 2l for moving the jaws outwardly on the arms are radially disposed and are simultaneously driven from a shaft 25 by means of meshing bevel gears 26 and 27. rlhe shaft 25 'is in turn driven by a drive shaft 28 having a worm and gear connection 29 and 30 with the shaft 25. rlFhe drive'shaft is preferably drivenby a motor 3l mounted on the base ll. 'llhe motor shaft 32 is connected to the drive shaft by means of a clutch 33 which is thrown into active or released position by a shaft rod 3l.

lEach traveling nut 22 is formed in halves which are conned against turning by, and carry with them a socket member '35 which is slidably mounted in the guides 13 by ide lugs 36 tting in the guide grooves threads, arev feed screws.

16. The socket member is operatively connected to and moves the related slide block 14 as will presently be described. The halves of the nut may be disconnected from the feed screw to facilitate locking the block stationary by` its pawl and rack as above described and to permit sliding the ,nut inwardly over thethreads of the feed screw to return the nut to its inward limit of movement. To effect this a cam disk 37 is turnably mounted on the socket member and is formed with eccentric slots 38 which engage pins 39 carried by the halves of the nut. Upon rotation of the disk by means of a handle lever 40 the'pins are moved to the outer ends of the slots and draw the halves of the nut out of engagement with the feed screw. Rotationof the disk in lthe opposite direction moves the halves into engagement with the feed screw.

A right and left threaded adjusting screw 41 connects the socket member on one arm of each pair of opposite arms 12 with the slide block'14 of the arm, andthe socket member on the opposite arm is connected to the slide block 35 on the arm by an elliptical spring 42, and member 35 a'djustably mounted on the block 35 by means of a right and left threaded screw 35". The spring also forms the operating member for an indicating device which may be of any desired type but preferably is of a well known type comprising a dial 43 supported by a' bracket 44 connected to one side of the spring as shown at 45 and carrying a pointer 46 which may be manually set to indicate any division mark on the dial scale. The dial also carries a second pointer 47 which is connected to the opposite side of the spring by a rack and pinion device 48 and 49 that is operated by distortion of the spring from normal to swing the pointer 47 relatively to the pointer 46. f

VThe operation of.. the device is as follows: A portion of the fabric to be tested is applied to the jaws, the warp threads being engaged betweenfthe jaws of two of the opposite arms andthe weft threads being similarly engaged between the jaws of the other two opposite arms. The handle levers 40 of two yof the opposite traveling nuts, say for instance, those controlling the slide blocks which operate the jaws grasping the weft threads, are then turned to apply the traveling nuts to the threads of the related The machine is then started and when the jaws have moved sufficiently apartto place the weft threads under a predetermined tension, which is indicated by the indicating device, the machine is stopped and the handle levers turned in the opposite direction to release the traveling nuts, from the feed screws. The pawls and racks of the jaws. operate nowto prevent return of the jaws so that the weft threads are mainfabric may be determined while subjected to approximately the same conditions of tension, chafing, etc., that exist in a tire in service.

While I have described and illustrated the preferred embodiment of my invention, it is to lbe understood that the various modificaj tions may be restored to within the scope of the appended claims without sacrificing any of the advantages or departing from the spirit of the invention.

What I claim and desire to protect by Letters Patent is:

' 1. A machine of the class described comprising means for simultaneously exerting a tension on series of crossed threads of a fabric for substantially the entire extent of a given area to be tested, and means for indicating the breaking-point of each series of the' tensioned threads independently of the other. l

2. A machine of the class described comprising means for simultaneously exerting on series of crossed threads of a fabric a pull longitudinally of the threads and means' for indicating the breaking-point of of the tensioned threads.

3. A machine of the class described comprising means for simultaneously exerting a tension on series of crossed threads of a fabric while maintaining the shape of the surface of the fabric substantially unaltered and means for indicating the breaking-point of a series of the tensioned threads.

4. A machine of the class described comprising means for simultaneously exerting a tension on series of crossed threads of a fabric, means for indicating the tension of a series one series of the tensioned threads, and

means for indicating the breaking point of a second series of the tensioned threads.

A machine of the class described comprising means for gripping intersecting threads of a fabric on opposite sides of their intersections, means for moving the gripping means to tension the threads, and means for indicating the breaking point of a series of the tensioned threads. l

6. A machine of the class described comprisin means for gripping intersecting threa s of a fabric on opposite sides of their intersections, ides tor said means arranged at right angles to each other, means for moving the gripping means on the guides to tension the threads, and means tor indicating the breaking point et a series ot the tensioned threads. s

il .d machine iitheciass escribed comprisin means or ippin vintersectintr threads of a fabric on lppositg sides ot' their?" intersections, a shait concentric with said means,l radiaiiy disposed teed screws driven,

by said shait,l traveling nuts on said :toed screws operativeiy connected with and moving said grippin meansontward to tension said threads, an means tor indicating the breaking point ot a seriesoi the tensioned threads.

8. A machine oi? the ciass described comn Aprising Jawsy iter gripping intersecting threads ot a fabric intersections, means tor movingl the jaws radiaiiy apart to tension said threads, a spring Areceiving the tension ot one or the tensioned'threads,I and means operated by the spring tor indicating the breaking point ot said thread., i

9.' A machine oit the ciass described com- Y prising'means tor exerting a tension on certain threads of a fabric, means tor eaerting a tension on other threads crossing the hist-mentioned threads and means :tor indicating the breaking-point ot said other on opposite sides or their threads while maintaining the said 'mst-mentioned threads.. Y

i0. d machineot the ciass described coinprising jaws arranged in pairs tor gripping intersecting warp and wett threads on oppo site sides or their intersections, means tor independently moving each pair ot jaws outward to separately tension the warp and the weit threads, means i'or iociring one pair oiB the jaws stationary at a predetermined stage oit their outward movement, and means tor indicating the breahing point ot the threads tensioned by the other pair oilI jaws.. v

1li. d machine or the class described comprising jaws arranged in pairs tor gripping intersecting warp and lwett threads on op posite sides et their intersections, means tor independentiy. moving' each pair ot jaws outward to separateiy tension thewarp and the wett threads, means tor siachening or increasing the tension oi said threads independentiy oi` .the hrst named means, means t'or locmng one pair or the jaws stationary at a predetermined stage oit their outward movement, and means i'or indicating the tension on breaking point oit the threads .tensioned the other pair ot jaws..

i Signed at Detroit, Michigan, this 18th isis.

'nnwnv n. a.. et. marmi.,

day et February,

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